RFL 9785 - Receiver Downshifter Module; Receiver Downshifter Module Description

Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
Section 11. RECEIVER DOWNSHIFTER MODULE
C87
P1
TP15
U2
R52
TP12
TP19
R53
TP14
C91
C86
R54
R55
C94
C71
L8
U12
C83
R50
R51
R63
R28
C36
C69
U11
C81
TP17
R49
L10
Y1
CR3
CR4
C5
C27
U14
Y2
C76
C75
C93
C74
C38
CR2
C82
TP11
TP10
TP9
TP8TP7
TP6
TP5
R15
R10
U7
U6
TP1
TP3
R48
R42
R45
R43
R44
R40 R39
R38
R37 R36 R35 R34
R33
R32
R31
R29 R30
R24 R27 R25 R26
R23 R22 R19 R18
R21
R20 R17 R16
R13 R12 R14
R11
R9
R8 R7
R6
R5
R4
R1 R2
R3
R47
L2
L6
L7
L3
L5
C4
C77
TP18
C31
C33 C32
C55
C28C26
C80
C79
C78
R56
C68
C67
C56
C57
C60
C61
C84
C59
C63
C62
C58
C64
C44
C45
C46
C49C51
C50
C48
C54
C52
C47
C53
C40
C39
C35
R60
C19
C20
C8
C11 C16
C12
C10
C14
C13
C9
L11
C70
C66
C43 C42 C41 C37
C30
C24 C22
C23
C18
C17
C6 C7
C3
C2
TP13
J3
U10
U8
C65
R66
Q1
U5
C34
CR1
C29
U4
SW2
U3
TP4
TP2
R65
FL101
U1
C85
R41
C92
R46
C95
L4
L1
C25
C15
C1
C90 C89
C88
C21
L9
U13
R59
R58
R57
J1
U9
C99
C97
C100
C101
C103
C102
C98
J2
R64
R62
R61
R70
U15
R67
R69
TP20
R68
C96
C104 C105
C73
TP16
9785 RX DOWNSHIFTER ECB NO 106578 REV E
GAIN
GAIN
LO
HI
50
40
30
20
10
ATTEN
dB
0
1999 RFL ELECTRONICS INC., BOONTON, NJ, U.S.A.
.25 .5 1 2 4 8 16 32 64 128 256 512
KHZ
32
AC
1
+
+
+
+
+
+
+
+
+
1
+
+
Figure 11-1. RFL 9785 Receiver Downshifter Module
11.1 DESCRIPTION
The RFL 9785 Receiver Downshifter Module (Figure 11-1) is used to shift the desired set of incoming
rf signals down to a lower range, around 24 kHz, to be further processed by the receiver detector
module (Section 12). Its channel filter, which is 3700 Hz wide, will pass carrier signals or voice
sidebands of the carrier, if present. The Downshifter Module contains a set of DIP switches which
allow a user to program the desired receive frequency.
For specific component information at the board level please contact the factory with the board
part number and revision level. Receiver Downshifter Module Schematics are provided at the end of
this section.
RFL 9785 RFL Electronics Inc.
June 18, 2009 11-1 (973) 334-3100